Crosswind Shooting

Wind is a very important factor for long range shooting accuracy. With ordinary conventional riflescopes, it is very difficult to determine your point of impact in windy conditions.



For example: If the target is 300yds away and the windspeed is 20MPH, a 270 cal. 130 gr. bullet will drift approximately 13.4" (see diagram A).



If the target is 400yds away, with the same wind speed, the bullet will drift more than 2' (feet). In both cases you missed your target.

Our KOC I and KOC II reticles are engineered to compensate with 2 windage circles on the horizontal line (see diagrams below).

CROSSWIND EXAMPLE
Cal..270, 130gr Nosler Partition Federal Premium
Wind Drift in inches for 20MPH crosswind

  • 300 yrds crosswind bullet drift 13.4"
  • 400 yrds crosswind bullet drift 24.8"
  • 500 yrds crosswind bullet drift 40.5"
  • 600 yrds crosswind bullet drift 61.0"
  • 700 yrds crosswind bullet drift 87.0"

Diagram A
Ordinary conventional riflescope

WIND 0 MPH
On target

WIND 20 MPH

WIND DIRECTION --->

In the above diagram of the KOC reticle, the red dot is the point of aim, the green circle shows the point of impact at 300yds (20MPH wind the bullet will drift 13.4")

WIND 20 MPH

In the above diagram of the KOC reticle, the red dot is the point of aim, the green circle shows the point of impact at 400yds (20MPH wind the bullet will drift 24.8)

In the above diagram, the red dot is the correct point of aim at 300yds. The green dot is the point of impact at 20MPH. The bullet will drift 13.4"

In the above diagram, the red dot is the correct point of aim at 400yds. The green dot is the point of impact at 20MPH. The bullet will drift 24.8"